I don't see any problem here because I believe new payment providers will be created soon and they'll offer their services to the other crypto casino not having a crypto to fiat payment gateway yet and that's if they'll need one. I believe they'll do this because they'll want to establish their brand.

And the best way to establish your brand in an industry that's already dominated by similar projects is to collaborate with casinos that are already popular but don't have a fiat to crypto payment getaway yet. That's just the way things always work out through collaboration.

But this gateways are becoming less popular as gamblers are preferring to withdraw their profits or make deposit through cryptocurency because they're fast and very reliable unlike the payment gateway that can be slow at times and unreliable due to failed or poor network.